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NFSD: don't report compiled-out versions as present

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The /proc/fs/nfsd/versions file calls nfsd_vers() to check whether
the particular nfsd version is present/available. The problem is
that once I turn off e.g. NFSD-V4 this call returns -1 which is
true from the callers POV which is wrong.

The proposal is to report false in that case.

The bug has existed since 6658d3a7bb "[PATCH] knfsd: remove
nfsd_versbits as intermediate storage for desired versions".

Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: stable@kernel.org
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Pavel Emelyanov 2010-05-14 15:33:36 +04:00 committed by J. Bruce Fields
parent 4dc6ec00f6
commit 15ddb4aec5
1 changed files with 1 additions and 1 deletions
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2
fs/nfsd/nfssvc.c
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@ -120,7 +120,7 @@ u32 nfsd_supported_minorversion;
int nfsd_vers(int vers, enum vers_op change) int nfsd_vers(int vers, enum vers_op change)
{ {
if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS) if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
return -1; return 0;
switch(change) { switch(change) {
case NFSD_SET: case NFSD_SET:
nfsd_versions[vers] = nfsd_version[vers]; nfsd_versions[vers] = nfsd_version[vers];